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At 03:02 PM 04/24/2000 -0300, Zeca wrote: >List, > >In the PADI Undersea Journal - Second Quarter 2000, at page 79 there is >a interesting note : > >"Several scuba manufactures now recommend against using Viton o-rings in >any equipment used for production or delivery of breathing gases. The >concur is that when Viton combusts, it releases a gas compound that is >higly toxic in even trace amounts. >In most circumstances, Viton is one of most oxygen-tolerant o-ring >materials, making the probability of a combustion reaction exceedingly >low. This is why, until now, it was considered an optimum material for >o-rings in high oxygen equipment, such as those used for the production >od enriched air nitrox, and for breathing enriched air nitrox or oxygen. >However, because Viton combustion in breathing equipment can be lethally >toxic, several manufactures now recommend against it, even thought Viton >combustion is highly unlikely. Alternative material o-rings do not >resist combustion quite as well as Viton, but do not pose the same >toxicity risk and are still unlikely to combust in otherwise oxygen >clean and compatible equipment. For specific recommendations regarding >the use of Viton and information about suitable alternatives to Viton >o-rings in breathing equipment, contact the manufacture of the equipment >in question." > >So, I would like to hear from you guys, specially inside the USA, what >kind of material are you using at this moment. > >All the Best, > >Zeca I never breathe my O2 when my tank, or reg is on fire, unless I'm fishing, then I just don't worry about it. "SILT HAPPENS"JD JEFF DISLER SAFE CAVING NSS 26000 -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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